Programmed death‐ligand 1 (PD‐L1), a programmed T cell death receptor protein, is also an important immunosuppressant molecule in the human body, and it can bind with its ligand PD‐L1 to inhibit the activation of antigen‐specific CD8+ T cells, thus promoting the immune escape of tumor cells.10 The gene discussed is CD8A; the disease is neoplasm.